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The confident and energetic retiree said her age-defying appearance has caused her headaches. People who don't know her often mistake her son, 22, for her boyfriend.

Liu said once she went to attend a friend's wedding with her son, who works as an assistant at a film production company. She was pestered by many guests who wanted to find out if the 22-year-old was her new partner.

Although the active mother has enviable olive skin and flawless complexion, she claimed that she rarely uses cosmetics.